Normally, it’s referred to as out of band management. Using telnet is management in band, as you are using network resources to access the device. Unless, you setup a non-routable vlan for just such administration. We have what we call a MOBNET, management out of band network, to accomplish this task. The routing to the MOBNET is not done by our main routers. It is done on a separate switch. Of course, to get to that switch from a desktop, you are still using the in-band network to get to the out of band router. Also on the MOBNET network, we have UNIX systems connected to the console ports of our switches in the wiring closets. Using a “tip” session on these systems, we can control the switch, out of band.